Document removal of $ with indexes in ResourceMapper

Author: rubensworks

lib/resource-mapper.js

@@ -56,6 +56,7 @@ class ResourceMapper {
       // If the extension is not correct for the content type, append the correct extension
       if (this._getContentTypeByExtension(path) !== contentType) {
         // Append a '$', unless we map for the index
+        // Because the index must _always_ have a proper extension when it is being created
         if (!isIndex) {
           path += '$'
         }